#include <bits/stdc++.h>
using namespace std;
using uint=unsigned int;
using ll=long long;
using ull=unsigned long long;
using i128=__int128;
const int N=1e5+5;

void solve(){
    int n;
    cin>>n;
    int a[N]={0};
    for(int i=0;i<n;i++){
        cin>>a[i];
    }
    int x,cnt=0;
    cin>>x;
    for(int i=0;i<n;i++){
        if(x>=a[i]){
            cnt++;
            x-=a[i];
        }
    }
    cout<<cnt<<endl;
    return;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    solve();

    return 0;
}